Lake Highlands High School (LHHS) is a secondary school serving grades 9–12 in the Lake Highlands area of northeastern Dallas, Texas, United States, primarily serving the Lake Highlands community. The school is part of the Richardson Independent School District and is in central Lake Highlands near the DART Blue Line. The Lake Highlands Freshman Center formerly housed the 9th-grade students, but has recently been integrated into the rest of the school, housing classes for all 9–12 students. The first graduating class of Lake Highlands High School was in 1964.

Lake Highlands is a neighborhood constituting most of Northeast Dallas. The neighborhood is a collection of dozens of subdivisions served by Richardson ISD and Dallas ISD public schools, as well as an array of private schools.